A young white fox called Dilah returns home to find his mother gravely injured. Before she dies, she tells him about a treasure with the power to make animals human. The clues to its location are contained in a moonstone buried beneath their den. But wicked blue foxes seek the treasure too and Dilah must race to find it first. Along the way, he meets all sorts of other creatures: a friendly seal, an ancient tortoise and a fierce leopard – but can he stay one step ahead?